tia_hmi_authoring_capabilities

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

readOnlyHint=true is consistent with a 'Report' tool, so there is no contradiction. The description adds real context beyond the annotations: the output reflects declared adapters and implemented boundaries, and must not be read as live verification of the environment. That staleness caveat is valuable. It still does not describe the shape of the response, and the tool has no output schema to rely on, so the description leaves the agent guessing about what fields it will receive.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two short, front-loaded sentences with no filler. Every phrase carries weight. The wording is so compressed that it becomes opaque, however, and some density could be exchanged for clarity without losing conciseness.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a zero-parameter read-only tool with no output schema, the description should at least say what the agent gets back and how to act on it. It provides the important caveat that results are declarative, not live checks. It does not explain what the agent should do with the reported adapters or boundaries, such as deciding whether an authoring operation is supported, so an agent cannot use the result confidently.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The tool takes no parameters, so there is nothing for the description to disambiguate. The baseline score for a zero-parameter tool therefore applies. The description does not need to describe input semantics, and it does not confuse the agent with such semantics.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description names a verb and a subject: it reports HMI software/version adapters and the authoring boundaries that are actually implemented. That is more specific than a restatement of the name. However, the wording stays dense with domain jargon, and the description never says explicitly that this is a read-only discovery/capability-listing tool. It also does not distinguish itself from discovery-type siblings such as tia_list_hmi_targets or tia_doctor, so an agent must infer the difference.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is given for when to call this tool, when not to call it, or which alternatives to prefer. The sentence 'Availability is not live verification' is a caveat about how to interpret the result, not a trigger for calling the tool. An agent still cannot tell from this description whether to call this tool before planning an edit, or to use a target-listing or diagnostics tool instead.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.